High pressure reciprocating piston compressor



July 28, 1931. c. sczmluzn 1,816,403

ama rassua n ncrrnoonmq PIsToN couPnEsson l original Filed' Feb. 5,y192e INV-ENTDR NTDRNM I Patented yJuly 28, y1931 UNITED sTAJEsl PATENTOFFICE CHARLES SCHAER, oF ,LANGENTHAL SWITZERLAND, nsSrGNoR To THE EIR-MoF sULzER FRERES SOCIETE ANONYME, E WINTERTHUR, SWITZERLAND Y, y

' HIGH PRESSURE RECI'PRocATING PIsToN COMPRESSOR original lapenas@ mea.February. 3, 192s, serial No; 251,714, and in switzerland June s., 1927.Divided and this application led J'a'nuary 30, 1930. vSerial No.424,555..

This yinvention Arelates to high pressure piston or'reciprocatingcompressors or the like'of the kind in which the vworking pistonsof thecompressor or their intermediate pistons are actuatedby primary'or'driv- Y ing pistons which arepreferably exposed on both faces to theaction ofa column of'liquid. vThe output of such compressors hashithertobeen limited by the dimensions ofthe L3-110 last stage and notby the power of the-'driving apparatus, the dimensionsv of the laststage beng themselves limited by the lquestion of packingtheworkingpiston and stuiiing boxes. vIn fact,fas regards the latterthere 15.15 is a definite" diameter, which if exceeded, cannot beeicientlypacked with the means at present available. Y n

The invention has `for its object to provide an improved construction ofsuch compressors yinwhich these vdisadvantages are obviated and theoutput increased while simplifying the 'driving mechansm. Y

According to the present invention at least 'two intermediatepistonsrespectively actufate the individual working pistons of two ormore compressor cylinders arrangedin parallel for the purpose ofincreasing the output of the compressor ywhile"simplifying lthe drivingmechanism. `Bythe term arranged in parallel, as used abovejandthroughout 'the remainder of' the' description, is intended to be meantthe arrangement of the cylinders whereby they operate in the samestage.VA

lThe liquid columns which' act onV the'intermediate'pistons of thesecylinders are preferably all actuated by one and the same primarypiston. The cylinders may be arranged inpairs and the intermediatepistons of each pair may be connected by a column of liquid disposed inthe sameplane as that in which j is disposed the column ofliquidconnecting V one of the pairs of intermediate pistons and thecorrespondingI primary piston. Alternatively, the liquid column betweenthe intermediate `pistons of each pair may be disposed in a planetransverse to the plane in which is vdisposed the liquid column betweenone of the pairs of intermediate pistons and the corresponding primarypiston.

'59 A few eonstructional examples ofthe invention are illustrateddiagrammatically by way of example in the accompanying drawinfrs, inwhich E' Y A y -igure'l is a sectionalview of two stages for example thetwowuppermost stages, 01:"5 one form of piston compressor according tothe (invention, Y Y y Figure 2 is a plan view of a modification of Vthearrangement of `Figure 1, `Figure 3 is a sectional view on the line' 60III-III of Figure 2. v

In `the Yconstruction illustrated in Figure 1 the movement of the liquidcolumns within the cylinders 8, 9 and V10 is effected byM double-actingprimary pistons 5, 6 and 7 mounted on a piston rod 4 which is connectedto the crank 1 ofthe driving machine (not l32 ofthe'compressor'cylinders 33 Vand 34.'

Between the primary pistons 5,6and7 and one face of eachof theintermediate pistons 17, 18 19, 20, 21 and 22 are provided liquidcolumns 35, 36, 37, 38, 39 and 40 respectively, andbeo tween theadjacent intermediate pistons 17 and 18, 19 and 20, and 21 and 22 arere- 85 spectively provided liquid columns 41, 42 and 43. f To thesuctionv pipe 44 for the cylinders 27, 28, 29 and30- of Vtheseeond laststage are connected the suction valves 45 46, 47 and 48, the deliveryvalves 49 and 50 for the cylinders 30 and 29of this stage beingconnected to the suction pipe 51 and th( suction valve 52 forthecylinder 34 of the last stage of the compressor, while the deliveryvalves 53 and 54- for thecylinders 28` and 27 are connected to thesuction pipe55 and the suction valve 56 for the cylinder'33 of the laststage. The delivery pipe 59 for the last stage leads" from the deliveryvalves 57 and 58 for the cylinders 34 and 33 'to thcf W* point ofconsumption of the compressed gas. The liquid columns between theadjacent intermediate pistons are arranged in the same plane as theliquid columns between one intermediate piston and the correspondingprimary piston.

The intermediate pistons 19, 20, 21 and 22, actuated by the primarypistons 6 and 7,

c cause the compressor pistons 23, 24, 25 and 26 to act on the mediumwithin the cylinders 27 28, 29 and 30 respectively, wliicliare arrangedin parallel, while 'the intermediate pistons 17 and 18 actuated by theprimary piston 5 cause the compressor pistons 31 `and to act on themedium within the cylinders S8 and 34 respectively, which arealsoarranged in parallel.

The construction shown in Figures 2 `and 3 4differs Yfrom that shown inFigure 1 in that the liquid columns between adjacent intermediatepistons are disposed in a plane transverse to the plane of the liquidVcolumn between-one rot' the pairs of intermediate pistons and thecorresponding primary piston. In this arrangement the axes of the liquidcolumns 78 and 79 between the intermediate pistons '62 and 63 andbetween the intermediate pistons `66 and 67 are disposed perpendiculailytothe axes of the primary pistons and 61. The cylinders 7.0 and 71accordingly are arranged in parallel, as are also the cylinders 72 and73.

With this construction, the primary pistons'GO and 61 act on the pairsof vintermediate pistons 62-63 and ,6G-.67 of the cylinders 64-65 and(58-69 rl`he intermediate pistons (i2-63, actuated through the liquidcolumns 7 4 and 7 5 by the primary piston y60 and connected by theliquid column 78, actuate the compressor pistons 82 and 83 of thecylinders and 71, which are arranged in parallel.- Similarly, theintermediate pistons 66-G7, actuated through the liquid columns 7 G and77 by the primary piston (il and connected by the liquid column 79, actiii :a similar manner von the compressor `pistonsof the cylinders 68 and.69, which also are arranged in pai'- allel. The supply to the suctionvalves is e'ected by the pipe 80 while the discharge vtakes place fromthe delivery valves through the pipe 81.

The invention enables the output of the known type of compressor to bedoubled, in spite of the tact that the driving mechanism is considerablysiinpli-lied and the plunger .diameter remains the saine. The diameteroil the st-uiiing boxes, shown only diagrammati- .cally, does notbecome-excessive and the reduction inthe dimensions reduces the extentto which the packing heats up, .so that frictional heat can be morereadily dissipated.

, In addition, expansion due to heat is reduced Y and the play betweenthe piston and the packin elements `is therefore less.

hisapplication iis division ot U. S. ap-

plication, Serial No. 251,714 filed February 8, 1928 and issued asPatent No. 1,7 67 ,404, J une 24, 1930.

I claim 1. In a high pressure reciprocating compressor, `the combinationWitha positively actuated primary piston, of a plurality of intermediatepistons, a plurality of compressor pistons arranged in parallel and eachactuated by one oi' said intermediate pistons, an oscillating .coliunnoi liquid between one side of said vprimary piston and one of saidintermediate pistons, an `oscillating column of liquid `between theother side of said primary piston and another of said intermediatepistons, and an oscillating `column of liquid between said intermediatepistons, said last named `column being disposed in a plane transverse tothat in which are disposed said i'rst named columns.

pressor, the combination with a plurality et positively actuated primarypistons, of a plurality of intermediate pistons, a plurality vofcompressorV pistons arranged in parallel and each actuated by one lofsaid intermediate pistons, an oscillating column of liquid between oneside of each oi said primary pistons and one of said intermediatepistons, an

oscillating column of liquid between the other side ot each of saidprimary pistons andanother of said intermediate pistons, and anoscillating column yoit liquid between the irst and lastnamed oi" saidintermediate pistons, said last named column being disposed in a planetransverseto that in which are Ydisposed said irst named columns.

3. In a high pressure reciprocating compressonthe combination with ahorizontally disposed positively actuated primary piston,

of a plurality of vertically disposed vintermediate pistons, a pluralityof compressor pistons arrangedV inparallel f pairs and each actuated byone of said intermediate pistons,

an oscilla-ting column of liquid between one. side ot said primarypiston and one of said intermediate pistons, an oscillating column ofliquid between the other side of said primary pistoii and anotherlofsaid intermediate pistons, `and an oscillating column of Aand eachactuated by one of said intermediate pistons, an oscillating columnotli'quid between one side of each'of said lprimary pistons and one ofsaidfintermediate pistons, an

4 .oscillating column of liquid between the other 2. In a high pressurereciprocating com-A side of each of said primary pistons and another ofsaid intermediate pistons, and an oscillating .column of liquid betweenthe first and last named of said intermediate pistons, said last namedcolumn being disposed in a plane transverse to that in which aredisposed said first named columns. Y v

In testimony whereof I aiix my signature.

CHARLES SCHAER.

